Forest Investment Account

Abstract of FII Project R04-046

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Road and Terrain Attribute Study of Road Fill Landslides, Kalum Forest District

Author(s): Van Buskirk, Calvin (BC Ministry of Forests)
Subject: Forestry
Series: Forest Investment Account (FIA) - Forest Science Program


As an approach to reducing the incidence of forest development related landslide activity, Terrain Stability Field Assessments have been carried out where it is proposed to construct roads in areas of potentially unstable or unstable terrain. The purpose of these assessments is to: Assess the slope stability hazard and risks associated with the proposed road construction; and Where practicable, provide suggestions for road design, construction and maintenance that would help to reduce or limit the slope stability hazards and/or risks. The focus of the past terrain stability assessments has mainly addressed the potential for fillslope instability and the predominant means of managing the landslide hazards and risks has been to implement a full-bench cut and end-haul construction technique. This relatively simplistic approach to landslide management has proven to be expensive, and in some cases, has not addressed all the aspects of forest road related landslides (the road construction has resulted in landslides in the road cutslope and/or on slopes downslope of the road). By analyzing both the natural and development related factors that give rise to road fillslope landslides, it is the opinion of the researchers that management techniques can be developed and implemented to reduce the frequency of road fill landslides and improve and/or economize the road construction practices. This would help to: Reduce the impact of forest road development on other forest resources; Reduce the cost of forest road development; and Increase the accessibility to potential timber supplies.

For further information, please contact Calvin Van Buskirk, BC Ministry of Forests

Updated September 08, 2005 

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